header {
  height: 66px;
  padding: 0 50px;
  line-height: 66px;
  border-bottom: 1px solid deepskyblue;
}
header nav li {
  margin: 0 20px;
}
.fist {
  font-size: 16px;
}
.fist::after {
  content: '';
  display: inline-block;
  width: 17%;
  height: 3px;
  background-color: deepskyblue;
  position: absolute;
  bottom: -2px;
  left: 20px;
}
header ul {
  height: 65px;
  position: relative;
}
header div {
  align-items: center;
}
.btn {
  height: 26px;
  border: 1px solid #aac6ef;
  border-radius: 13px;
  display: inline-block;
  line-height: 26px;
  text-align: center;
}
header .left {
  width: 58px;
  margin-right: 26px;
}
header .right {
  width: 78px;
  background-color: #ed510a;
}
.btn:hover {
  opacity: 0.5;
}
